    [er-cassandra.model.types :as t]
    [er-cassandra.model.error :as e]
    [er-cassandra.model.alia.fn-schema :as fns]
-   [er-cassandra.model.util :refer [combine-responses create-lookup-record]])
+   [er-cassandra.model.util :refer [combine-responses create-lookup-record]]
+   [taoensso.timbre :refer [info warn]])
   (:import
    [er_cassandra.model.types Entity]
    [er_cassandra.model.model_session ModelSession]))

                                      (into {}))
                new-target-record (merge null-denorm-vals
                                         fk-map
                                         target-uberkey-map)]
            (m/upsert session
                      target-entity
                      new-target-record
                      (fns/denormalize-opts->upsert-opts opts)))

          :delete
          (m/delete session

      :upsert
      (let [new-target-record (merge denorm-vals
                                     fk-map
                                     target-uberkey-map)
            otr (select-keys
                 target-record
                 (keys new-target-record))]
        (if (= otr new-target-record)
          (do
            ;; (warn "skipping update")
            (return deferred-context true)) ;; nothing to update
          (m/upsert session
                    target-entity
                    new-target-record
                    (fns/denormalize-opts->upsert-opts opts))))

      :delete
      (let [cascade (:cascade denorm-rel)]
